The question I have is how Excel not be aware of the impact of this issue on their reputation in the firearms community? And knowing they have serious credibility issues, can decline to engage to improve their bottom line?

Personally I will not stop until my issue has been addressed. I consider the current situation to be theft. I am out $600 and if I add the shipping of this pistol to Excel, $670 or so. I am going to recoup this cost, through either resolution of the issue, reimbursement of my costs, or impact on their bottom line. It bothers me that the situation is thus, but it was not my failure to pay, or my failure to trust in their product which caused the issue. The issue was caused by their apparent disregard for the most basic criteria of customer service: communication.